Introduction: A mycorrhiza is a mutualistic relationship between fungal hyphae and the roots of true plants. The fungal hyphae increase the
absorptive surface area of the roots of the plant by
aiding in the absorption of water, phosphorus, and other mineral ions from the soil
to the roots of
the plant. The plant is photosynthetic and provides the fungus with carbohydrates.
L

The teacher is mostly talking about the distillation of a mixture

You would be correct, boiling water does disinfect contamination.    the property of disinfecting means to kill  germs, bacteria and other pathogens or contamination  that might cause an infection or cause a person to become sickly. a couple methods of disinfecting are using soap, other cleaning supplies or by simply "boiling" the contaminate.  the reason why boiling water disinfects certain attributes is because some cells cannot survive the heat and pressure.